Question

3 ( x - 3 ) = 5x - 4 + 3 ( 7 - x )

x = ?
i tried working it out and got 21 but the answer was 26 , how do you show your workings

Answer 1

26

Explanation:

3 (x-3) = 5x - 4 + 3 (7-x)

3x - 9 = 5x - 4 + 21 - 3x

3x - 9 = 5x - 3x + 17

3x - 9 = 2x + 17

3x - 2x = 17 + 9

x = 26

Answer 2

26

Explanation:

3 ( x - 3 ) = 5x - 4 + 3 ( 7 - x )

3x-9 = 5x-4 + 21 - 3x

collect like terms

3x-9 = 2x +17

move the terms

3x-2x = 17+9

x=26